W3C home > Mailing lists > Public > www-validator-css@w3.org > September 2001

Errors? Reported

From: Zachariah <zachariah@pearpie.com>
Date: Tue, 18 Sep 2001 17:41:00 -0700
Message-Id: <>
To: www-validator-css@w3.org

I used the CSS validator to check the index at


I am getting errors on the microsoft proprietary properties to change the 
color of the scroll bars in microsoft's browser.  I feel that they should 
be reported as "Warnings" instead of "Errors" because of what is says in 
the CSS2 specification (see below).

But please correct me if I am wrong (or let me know if you know of this 
being discussed at all), but as I understand it, using properties which are 
unknown to CSS2 does not make the CSS style sheet invalid (which was done 
for forward compatibility), and therefore reporting unknown properties as 
errors is misleading.

Zachariah Heyer

4.2 Rules for handling parsing errors
     * Unknown properties. User agents must ignore a declaration with an 
unknown property. For example, if the style sheet is:

H1 { color: red; rotation: 70minutes }

       the user agent will treat this as if the style sheet had been

H1 { color: red }
Received on Tuesday, 18 September 2001 20:41:19 UTC

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